Newsletter Subscription Page

I want to setup newsletter subscription page to allow visitors to get sent news letters.

I had found following code which use to work but now is not working.

Code:

<form id="subscribes_form" action="" method="post" name="subscribes_form"><input id="newsletter_action" type="hidden" name="newsletter_action" value="" />
<div style="padding: 10px 5px 2px 10px;">
<h1>Newsletter</h1>
<h5><input id="e_newsletter_email" type="text" name="e_newsletter_email" /></h5>
</div>
<div style="padding: 10px 5px 2px 10px;"><input id="new_subscribe" style="height: 2em; width: 10em;" type="button" value="Subscribe" /></div>
</form>

End Code

Is there an up date to this or how would you advise this can be achieved ?>

example page: http://project365.com.au/subscribe-to-newsletter/

thx